Authors: N Yamada; H Shinzawa; K Ukai; H Wakabayashi; H Togashi; T Takahashi; N Seo; S Ishiyama; M Tsukamoto; S Fuyama Journal: J Gastroenterol Hepatol Date: 1993 Mar-Apr Impact factor: 4.029
Authors: Y M Park; C D Lee; K H Yoon; N I Han; H M Cho; K S Yook; J W Jeong; B S Kim; M K Jee; B K Kim Journal: Korean J Intern Med Date: 1989-01 Impact factor: 2.884